HELP on iptables!!!!!! 1

[llingf]

hi everyone:
I'm new to linux. I urgently need help on the iptbables issue.
the linux server that running redhat enterprise version 3 suddenly blocking the
port 2119 from accessing from out side, and there is no change on the iptables configuration, as soon as I take down the
iptables, users were able to access the linux through port 2119 without problem.

thanks in advance for any comments.

lin

 

[ericbrunson]

Clearly something *did* change in your iptables.

When was the last time /etc/sysconfig/iptables was changed? If someone manually added a rule and *didn't* do an "service iptables save", then the next time the service got restarted it would revert to the config before the change was made.

Read the man page or a tutorial on iptables to see how to add a rule, then save the config for the next service restart.